CN106057277A - Silver paste for forming back silver electrode of back passivation solar battery - Google Patents
Silver paste for forming back silver electrode of back passivation solar battery Download PDFInfo
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- CN106057277A CN106057277A CN201610393173.3A CN201610393173A CN106057277A CN 106057277 A CN106057277 A CN 106057277A CN 201610393173 A CN201610393173 A CN 201610393173A CN 106057277 A CN106057277 A CN 106057277A
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- silver
- electrode
- solar battery
- silver electrode
- powder
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 69
- 239000004332 silver Substances 0.000 title claims abstract description 69
- 238000002161 passivation Methods 0.000 title abstract description 16
- 239000000843 powder Substances 0.000 claims abstract description 49
- 239000011521 glass Substances 0.000 claims abstract description 31
- 239000000919 ceramic Substances 0.000 claims abstract description 26
- 239000002002 slurry Substances 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 7
- 208000035126 Facies Diseases 0.000 claims description 5
- 239000010946 fine silver Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229910026551 ZrC Inorganic materials 0.000 claims description 2
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 claims description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 2
- 238000004017 vitrification Methods 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 16
- 238000005245 sintering Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 238000003466 welding Methods 0.000 abstract description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 abstract description 2
- 230000006378 damage Effects 0.000 abstract description 2
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000005476 soldering Methods 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 11
- 229910052710 silicon Inorganic materials 0.000 description 11
- 239000010703 silicon Substances 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 4
- 238000000498 ball milling Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 2
- 239000005751 Copper oxide Substances 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 2
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 2
- PRXRUNOAOLTIEF-ADSICKODSA-N Sorbitan trioleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](OC(=O)CCCCCCC\C=C/CCCCCCCC)[C@H]1OC[C@H](O)[C@H]1OC(=O)CCCCCCC\C=C/CCCCCCCC PRXRUNOAOLTIEF-ADSICKODSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- WUOACPNHFRMFPN-UHFFFAOYSA-N alpha-terpineol Chemical compound CC1=CCC(C(C)(C)O)CC1 WUOACPNHFRMFPN-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 229910000416 bismuth oxide Inorganic materials 0.000 description 2
- 229910000431 copper oxide Inorganic materials 0.000 description 2
- SQIFACVGCPWBQZ-UHFFFAOYSA-N delta-terpineol Natural products CC(C)(O)C1CCC(=C)CC1 SQIFACVGCPWBQZ-UHFFFAOYSA-N 0.000 description 2
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 235000019325 ethyl cellulose Nutrition 0.000 description 2
- 229920001249 ethyl cellulose Polymers 0.000 description 2
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 2
- 229910001947 lithium oxide Inorganic materials 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 229940116411 terpineol Drugs 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- OAYXUHPQHDHDDZ-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethanol Chemical compound CCCCOCCOCCO OAYXUHPQHDHDDZ-UHFFFAOYSA-N 0.000 description 1
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 description 1
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- -1 alcohol ester Chemical class 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- OBETXYAYXDNJHR-UHFFFAOYSA-N alpha-ethylcaproic acid Natural products CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010329 laser etching Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/14—Conductive material dispersed in non-conductive inorganic material
- H01B1/16—Conductive material dispersed in non-conductive inorganic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/14—Conductive material dispersed in non-conductive inorganic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Conductive Materials (AREA)
Abstract
This invention discloses a silver paste for forming back silver electrode of back passivation solar battery. This invention adopts conductive ceramic ultrafine powder to replace part of low-temperature glass powder in the silver paste, reduces the damage of the passivation layer caused by the silver electrode in the electrode sintering process, and simultaneously reduces the bulk resistivity of the silver electrode so as to improve the electrical property of the silver electrode. Moreover, since part of low-temperature glass powder is replaced by the conductive ceramic ultrafine powder with high melting point, the silver electrode is prevented from being eroded by a soldering tin during the welding process of the silver electrode; and thus, the mechanical adhesive force of the silver electrode is improved.
Description
Technical field
The present invention relates to technical field of solar batteries, be specifically related to photovoltaic industry high-performance silver conductor paste, especially
Relate to a kind of silver slurry for forming back of the body passivating solar battery back silver electrode.
Background technology
Photovoltaic element (photovoltaic device) easily obtains owing to it will originate in light source (such as, sunlight)
Energy be converted into electric power, with manipulation such as, the electronic installation such as computer, computer, heater, so photovoltaic element is by extensively
Ground uses.Modal photovoltaic element is silica-based solar cell.
The back of the body passivation silica-based solar cell (PERC battery) represents routine silicon solar cell specific type, they be
On the basis of conventional silicon solar cell, form the thick oxide passivation layer of one layer of 70-170nm at cell backside, thus reduce
The back side of solaode is combined, and promotes battery efficiency；Then perforate or groove on laser etching techniques passivation layer overleaf is used,
So that it is in electrical contact between back metal electrode and silicon substrate.
In order to ensure that backside passivation layer plays corresponding passivation effect, it is necessary to assure the integrity of passivation layer, therefore want
Seek back silver slurry used by back of the body passivation silica-based solar cell, in sintering forms the pyroprocess of back silver electrode, control silver electricity
The extremely corrosion to backside passivation layer, ensures the adhesive force between electrode and silicon chip, to meet the weldering after solaode simultaneously
Connect encapsulation requirement.In order to obtain the more preferable electrode of performance, the silver-colored slurry formula that sheet resistance value is lower is the selection optimized.
Chinese patent application 201280009271.2 disclose one " for formed passivation emitter silver-colored backplate and
The method of rear-face contact silicon solar cell ", used silver slurry therein comprises at least one frit (glass dust), is burning
During knot, by controlling softening point and the addition of glass of glass dust, control the electrode corrosion to backside passivation layer.
Summary of the invention
For the problems referred to above, the present invention uses conductivity ceramics superfines to be substituted for forming the back of the body passivating solar battery back side
Part cryogenic glass powder in the silver slurry of silver electrode, thus decrease the silver electrode destruction to passivation layer in electrode sintering process,
Reduce the bulk resistor of silver electrode simultaneously, and then improve the electric property of electrode；It is additionally, since use dystectic conduction pottery
Porcelain superfines instead of part cryogenic glass powder, thus during preventing electrode welding, the scolding tin erosion to silver electrode,
Improve the mechanical adhesion of electrode.
Technical scheme is as follows:
A kind of silver slurry for forming back of the body passivating solar battery back silver electrode, silver paste comprises one or more conductions
Methods of Ceramic Ultrafine Powders.Known in powder field, described superfines is usually particle mean size and is not more than the powder of 10 μm.
One of present invention main points of technical scheme solving technical problem are to select suitable conductivity ceramics superfines, mesh
Be to reduce the consumption of cryogenic glass powder in silver slurry, thus reach reducing electrode sintering process to back of the body passivation etching
Meanwhile, reduce the bulk resistor of silver electrode, and promote the mechanical adhesion after electrode welding.In order to reach this requirement, selected
Conductivity ceramics ultra-fine end granularity needs moderate.As excessive in conductivity ceramics powder size, because conductivity ceramics powder cannot burn at electrode
Softening during knot, argentum powder will separate with conductivity ceramics superfines in sintering process with cryogenic glass powder, it is impossible to has been formed
Whole silverskin, will affect the consistency of electrode, and cause electrode resistance to rise, loss of adhesion.Such as conductivity ceramics powder size mistake
Little, will adsorb on cryogenic glass powder and argentum powder surface, improve cryogenic glass powder and the sintering temperature of argentum powder, improve the electricity of electrode
Resistance.
In a preferred embodiment of the invention, the mean particle size range of selected conductivity ceramics superfines is 0.1-5 μm, excellent
The mean particle size range of choosing is 0.5-1.5 μm.
In a preferred embodiment of the invention, described conductivity ceramics superfines be selected from titanium carbide, tungsten carbide, zirconium carbide
One or more.
In a preferred embodiment of the invention, the content of described conductivity ceramics superfines is 0.5-3wt%.
In a preferred embodiment of the invention, silver paste also includes following components:
40-57wt% argentum powder；0.8-3wt% cryogenic glass powder, remaining is organic facies.
Described argentum powder includes at least one super fine silver powder, and the granularity of described super fine silver powder is 0.1-2.5 μm.Described ultra-fine
The pattern of argentum powder can be spherical, class is spherical, lamellar or crystallite shape.Described super fine silver powder Surface coating has at least one surface to live
Property agent, to avoid the reunion of argentum powder, thus improves its dispersibility in the slurry.Described surfactant is selected from gelatin, hard
One or several in fat acid, Span 85, BYK110.
The vitrification point of described cryogenic glass powder is in the range of 350-450 DEG C.
The granularity of described cryogenic glass powder is 0.5-3 μm.
Described cryogenic glass powder includes the bismuth oxide of 40-60wt%, the silicon oxide of 15-30wt%, the oxygen of 5-15wt%
Change boron, the zinc oxide of 1-10wt%, the copper oxide of 1-5wt%, the lithium oxide of 1-3%.
Described organic facies selects one or more in ethyl cellulose, acrylic resin, hydrogenated rosin, alkyd resin to make
For Tackified polymeric, and select terpineol, alcohol ester 12, butyl carbitol, butyl carbitol acetate, diethylene glycol two fourth
One or more in ether, dibutyl phthalate as solvent, and preferably select Span 85, tween, BYK110,
One or more in BYK111, stearic acid, octanoic acid are as dispersant.
Described conductivity ceramics superfines first mixes with described cryogenic glass powder, and the mixture obtained mixes with other component again
Close.
Compared with prior art, beneficial effects of the present invention is as follows:
The present invention is ultra-fine by introducing conductivity ceramics in the silver slurry for formed back of the body passivating solar battery back silver electrode
Powder, carries out common burning with argentum powder, cryogenic glass powder, is conducive to silver slurry to form complete fine and close conductive silver layer in the course of processing,
And reduce the bulk resistor of electrode；The introducing of the conductivity ceramics superfines of high softening temperature, reduces cryogenic glass powder simultaneously
Consumption, while ensureing electrode welding adhesive force, also reduces cryogenic glass powder in sintering process to back of solar cell
The corrosion of passivation layer.
Certainly, the arbitrary product implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.
Detailed description of the invention
In this article, " numerical value is to another numerical value " scope represented, is that one is avoided enumerating in the description
The summary representation of all numerical value in this scope.Therefore, the record of a certain special value scope, contain this numerical range
Interior any number and the relatively fractional value scope defined by any number in this numerical range, as the brightest
It is the same compared with fractional value scope with this that literary composition writes out this any number.
Below in conjunction with specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate this
Bright, rather than limit protection scope of the present invention.Technical staff is in the scope without departing substantially from spirit of the present invention in actual applications
The interior improvement made according to the present invention and adjustment, still fall within protection scope of the present invention.
Embodiment
The present embodiment provides a kind of silver slurry for forming back of the body passivating solar battery back silver electrode.Wherein sheet selected by argentum powder
Shape argentum powder, particle mean size is 0.8 μm, and stearic acid selected by argentum powder surfactant.Cryogenic glass powder contains the bismuth oxide of 53wt%,
The silicon oxide of 25wt%, the boron oxide of 13wt%, the zinc oxide of 5wt%, the copper oxide of 3wt%, the lithium oxide of 1%, low temperature glass
The granularity of glass powder is 2.1 μm.
The silver slurry made for forming back of the body passivating solar battery back silver electrode of the present embodiment, the preparation that one is concrete
Method is as follows:
Cryogenic glass powder used is to be placed in alumina crucible by various oxides contained in low temperature glass powder component, adds
Heat melts to 1100-1200 DEG C, and is incubated 45-70 minute.Afterwards melted glass is poured into water shrend and obtains shrend material.Take out
Shrend material, is milled to desired particle size size with ethanol for ball-milling medium, obtains cryogenic glass powder.By conductivity ceramics superfines and
After the cryogenic glass powder mix homogeneously of above-mentioned preparation, then within 30-60 minute, form mixing nothing with ethanol for ball-milling medium ball milling mixing
Machine phase.Ethyl cellulose is dissolved in terpineol, dissolves clarification, as the organic facies of slurry.Take argentum powder, mixing inorganic phase,
Organic facies co-formulation becomes crude product slurry, upper three-roller to carry out 3 arounds to manage to obtain finished product silver paste.
The formula such as table 1 below of silver slurry in the example of P1-P7 of the present invention.
Table 1
By the finished product silver paste of above-mentioned preparation, it is printed onto on silicon chip formation silver electrode figure by silk-screen printing technique,
Again by conventional drying and sintering process, obtain the solar power silicon electrode slice that can test.
To above-mentioned P1 and P2 silver paste and with add conductivity ceramics superfines make silver paste printing after too
Sun can carry out sheet resistance value and the test of solder attachment power by silicon electrode sheet: test sheet resistance value method of testing is with reference to GB GB/T
17473.3-2008 " microelectric technique Precious Metal method of testing-sheet resistance measures ", solder attachment force test method reference
GB GB/T 17473.4-2008 " microelectric technique Precious Metal method of testing-adhesive force measures ".
The sheet resistance value test value of the solar power silicon electrode slice that the silver paste of P1 and P2 comparative example and each embodiment of P3-P7 prepares
With solder attachment power test value such as table 2 below.
Table 2
| Silver slurry sequence number | Sheet resistance value (10-3Ω/□) | Adhesive force (N) |
| P1 | 2.63 | 3.5 |
| P2 | 2.48 | 2.1 |
| P3 | 2.43 | 3.2 |
| P4 | 2.41 | 4.2 |
| P5 | 2.61 | 4.5 |
| P6 | 2.40 | 3.7 |
| P7 | 2.42 | 3.8 |
| P8 | 2.41 | 3.9 |
As can be seen from Table 2, the introducing of the conductivity ceramics superfines of the present embodiment, or reduce the body electricity of electrode
Resistance, or improve the solder attachment power of electrode, or two aspect performances all have lifting, made silicon electrode performance to be better than not
There is the silicon electrode that the slurry adding conductivity ceramics superfines makes.
Under the teaching of the present invention and above-described embodiment, those skilled in the art are easy to it is envisioned that cited by the present invention
Or each raw material or its equivalent alterations, each processing method or its equivalent alterations enumerated can realize the present invention and each former
Material and the parameter bound value of processing method, interval value can realize the present invention, embodiment numerous to list herein.
Claims (10)
1. starch for forming the silver of back of the body passivating solar battery back silver electrode for one kind, it is characterised in that silver paste comprises one
Or multiple conductivity ceramics superfines.
2. the silver slurry for forming back of the body passivating solar battery back silver electrode as claimed in claim 1, it is characterised in that selected
The mean particle size range of conductivity ceramics superfines is 0.1-5 μm.
3. the silver slurry for forming back of the body passivating solar battery back silver electrode as claimed in claim 1, it is characterised in that selected
The mean particle size range of conductivity ceramics superfines is 0.5-1.5 μm.
4. the silver slurry for forming back of the body passivating solar battery back silver electrode as claimed in claim 1, it is characterised in that described
Conductivity ceramics superfines is selected from titanium carbide, tungsten carbide, one or more of zirconium carbide.
5. the silver slurry for forming back of the body passivating solar battery back silver electrode as claimed in claim 1, it is characterised in that described
The content of conductivity ceramics superfines is 0.5-3wt%.
6. the silver slurry for forming back of the body passivating solar battery back silver electrode as claimed in claim 1, it is characterised in that described
Silver is starched and is also included following components:
40-57wt% argentum powder；0.8-3wt% cryogenic glass powder, remaining is organic facies.
7. the silver slurry for forming back of the body passivating solar battery back silver electrode as claimed in claim 6, it is characterised in that described
Argentum powder includes at least one super fine silver powder, and the granularity of described super fine silver powder is 0.1-2.5 μm.
8. the silver slurry for forming back of the body passivating solar battery back silver electrode as claimed in claim 6, it is characterised in that described
The vitrification point of cryogenic glass powder is in the range of 350-450 DEG C.
9. the silver slurry for forming back of the body passivating solar battery back silver electrode as claimed in claim 6, it is characterised in that described
The granularity of cryogenic glass powder is 0.5-3 μm.
10. the silver slurry for forming back of the body passivating solar battery back silver electrode as claimed in claim 6, it is characterised in that institute
Stating conductivity ceramics superfines first to mix with described cryogenic glass powder, the mixture obtained mixes with other component again.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610393173.3A CN106057277A (en) | 2016-06-03 | 2016-06-03 | Silver paste for forming back silver electrode of back passivation solar battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610393173.3A CN106057277A (en) | 2016-06-03 | 2016-06-03 | Silver paste for forming back silver electrode of back passivation solar battery |
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| CN106057277A true CN106057277A (en) | 2016-10-26 |
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| CN201610393173.3A Pending CN106057277A (en) | 2016-06-03 | 2016-06-03 | Silver paste for forming back silver electrode of back passivation solar battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106653144A (en) * | 2016-11-30 | 2017-05-10 | 无锡优顺能源开发科技有限公司 | Conductive slurry for back electrode of solar cell |
| CN107658045A (en) * | 2017-08-30 | 2018-02-02 | 南通天盛新能源股份有限公司 | A kind of unleaded PERC batteries back electrode silver paste and preparation method |
| CN108511108A (en) * | 2018-02-28 | 2018-09-07 | 江苏国瓷泓源光电科技有限公司 | A kind of solar cell positive silver paste and preparation method thereof of the low viscosity without thixotropic agent |
| CN111515379A (en) * | 2020-04-17 | 2020-08-11 | 常州联德陶业有限公司 | HTCC heating resistance slurry capable of inhibiting high-temperature migration of metal particles and preparation method thereof |
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| US6071437A (en) * | 1998-02-26 | 2000-06-06 | Murata Manufacturing Co., Ltd. | Electrically conductive composition for a solar cell |
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| CN102768464A (en) * | 2011-05-04 | 2012-11-07 | 上海鑫力新材料科技有限公司 | Photosensitive conductive aluminium paste and preparation method |
| CN104795128A (en) * | 2015-05-14 | 2015-07-22 | 刘飞全 | Lead-free resistance paste as well as manufacturing process and application of lead-free resistance paste |
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| US6071437A (en) * | 1998-02-26 | 2000-06-06 | Murata Manufacturing Co., Ltd. | Electrically conductive composition for a solar cell |
| CN102576575A (en) * | 2009-09-04 | 2012-07-11 | 巴斯夫欧洲公司 | Composition for printing electrodes |
| CN102576576A (en) * | 2009-09-04 | 2012-07-11 | 巴斯夫欧洲公司 | Composition for printing conductive tracks and method for producing solar cells |
| CN102768464A (en) * | 2011-05-04 | 2012-11-07 | 上海鑫力新材料科技有限公司 | Photosensitive conductive aluminium paste and preparation method |
| CN104795128A (en) * | 2015-05-14 | 2015-07-22 | 刘飞全 | Lead-free resistance paste as well as manufacturing process and application of lead-free resistance paste |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653144A (en) * | 2016-11-30 | 2017-05-10 | 无锡优顺能源开发科技有限公司 | Conductive slurry for back electrode of solar cell |
| CN107658045A (en) * | 2017-08-30 | 2018-02-02 | 南通天盛新能源股份有限公司 | A kind of unleaded PERC batteries back electrode silver paste and preparation method |
| CN108511108A (en) * | 2018-02-28 | 2018-09-07 | 江苏国瓷泓源光电科技有限公司 | A kind of solar cell positive silver paste and preparation method thereof of the low viscosity without thixotropic agent |
| CN111515379A (en) * | 2020-04-17 | 2020-08-11 | 常州联德陶业有限公司 | HTCC heating resistance slurry capable of inhibiting high-temperature migration of metal particles and preparation method thereof |
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